A chill in international relations

The trouble in dealing with spies and former spies is that one can never be sure when they're telling the truth and when they're spinning self-serving fables. After all, their lives and careers have depended on artful and persistent deception. A high-ranking agent for the KGB and later for its post-Cold War successor, the SVR, Sergey Tretyakov defected to the U.S. in October 2000, bringing...